Security Executive Agent Directive 4: National Security Adjudicative Guidelines (Effective: 08 June 2017) [open pdf - 14MB]
"This Security Executive Agent (SecEA) Directive establishes the single, common adjudicative criteria for all covered all individuals who require initial or continued eligibility for access to classified information or eligibility to hold a sensitive position. The Guidelines reflected herein supersede all previously issued national security adjudicative criteria or guidelines."
Security Executive Agent Directive 4
U.S. Office of the Director of National Intelligence: https://www.dni.gov/